The surface tension of aqueous solutions of 2-pyrrolidinone, 1-methyl-2-pyrrolidinone, and 1-ethyl-2- pyrrolidinone has been measured at temperatures from (20 to 50) deg C over the whole range of concentrations. The surface tensions of these aqueous binary mixtures show more concentration dependence on the waterrich side. The addition of a small amount of N-alkyl-2-pyrrolidinone drastically reduces the surface tension of water. This effect is related to not only the presence of hydrophobic groups that tend to remain at the air-water interface but also the influence of the complex interactions between N-alkyl-2-pyrrolidinones molecules on the surface tension.
Compounds
#
Formula
Name
1
H2O
water
2
C4H7NO
2-pyrrolidinone
3
C5H9NO
N-methylpyrrolidone
4
C6H11NO
1-ethyl-2-pyrrolidinone
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.